668367936 has 140 divisors (see below), whose sum is σ = 2045655040. Its totient is φ = 215550720.

The previous prime is 668367913. The next prime is 668367941. The reversal of 668367936 is 639763866.

It is a happy number.

668367936 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 158625 + ... + 162783.

Almost surely, 2^668367936 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 668367936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1022827520).

668367936 is an abundant number, since it is smaller than the sum of its proper divisors (1377287104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

668367936 is a wasteful number, since it uses less digits than its factorization.

668367936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4214 (or 4195 counting only the distinct ones).

The product of its digits is 5878656, while the sum is 54.

The square root of 668367936 is about 25852.8129223882. The cubic root of 668367936 is about 874.3229313536.

The spelling of 668367936 in words is "six hundred sixty-eight million, three hundred sixty-seven thousand, nine hundred thirty-six".